CN206461541U - A kind of electric motor starting and speed-regulating control circuit - Google Patents
A kind of electric motor starting and speed-regulating control circuit Download PDFInfo
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- CN206461541U CN206461541U CN201621319017.4U CN201621319017U CN206461541U CN 206461541 U CN206461541 U CN 206461541U CN 201621319017 U CN201621319017 U CN 201621319017U CN 206461541 U CN206461541 U CN 206461541U
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Abstract
The utility model is applied to power electronics and field of electric control starts and speed-regulating control circuit there is provided a kind of motor frequency conversion, and the circuit includes：Frequency conversion control unit, its power end is with exchanging electrical connection, its output end and motor connection；The first power end connection of two-way switch unit, its first input end and frequency conversion control unit, the connection corresponding with multiple trigger output ends of frequency conversion control unit of its multiple trigger control end, its output end and motor connection；Protection location; its first end is connected with the second input of two-way switch unit; its second end and the second source end of frequency conversion control unit are connected, and the feedback end of its detection output and frequency conversion control unit is connected, and the pulsewidth triggering end of its pulse-width controlled end and frequency conversion control unit is connected.The utility model controls bidirectional triode thyristor two-way admittance under industrial-frequency alternating current, and produces the rotating excitation field of frequency-changing AC electricity and speed variable in selective turn on process, realizes electric motor starting and speed governing, has expanded the use scope of motor.
Description
Technical field
The utility model belongs to machine field, more particularly to a kind of electric motor starting and speed-regulating control circuit.
Background technology
At present, three-phase permanent magnet synchronous motor so that its is simple in construction, firm, operation efficiently, velocity-stabilization, produce in the people,
Applied in life more and more extensively, wherein three-phase permanent magnet synchronous motor and BLDC (Brushless Direct Current
Motor, brshless DC motor) driver combined use, with small volume, lightweight, efficiency high, adjustable rotating speed, structure
Simply, reliable operation, it is easy to maintenance the advantages of, can adapt to motor miniaturization, high-output power and in direct current supply
Under use, thus be applied to more and more in household electrical appliance, electric tool, medicine equipment and light equipment.
However, three-phase permanent magnet synchronous motor can not but work under single phase industrial frequence alternating source, even if three-phase permanent is synchronous
The stator winding of motor can produce the rotating excitation field synchronous with electric voltage frequency, but ought turn when connecting three-phase main-frequency alternating source
When sub- magnetic pole is static, when its rotary inertia and its larger load torque, atwirl stator field causes the forward and reverse conjunction of rotor
It is 0 into torque, therefore, rotor can not voluntarily start rotation, causes three-phase synchronous magneto step-out and start failure.
In the prior art, it is typically employed in the mode for being set on the rotor of three-phase permanent magnet synchronous motor and starting mouse cage winding
Make it produce asynchronous induction torque to start, or stator field is slowly accelerated rotation using variable-frequency governor, so that motor is forever
Magnet rotor can slowly accelerate to rotate, and realize the startup of permagnetic synchronous motor.
But, due to adding startup mouse cage winding complex process, cost higher on rotor, and frequency-changing speed-regulating driver price
It is again more expensive, it is impossible to three-phase permanent magnet synchronous motor is used in more occasions, therefore using the permagnetic synchronous motor of prior art
It has impact on promoting the use of for three-phase permanent magnet synchronous motor.
Utility model content
The purpose of the utility model embodiment is to provide a kind of electric motor starting and speed-regulating control circuit, it is intended to solve existing
Mode realized when three-phase permanent magnet synchronous motor starts, complex process, the problem of cost is higher.
The utility model embodiment is achieved in that a kind of electric motor starting and speed-regulating control circuit, is connected to single-phase solid
Determine between frequency AC source and three phase electric machine, the circuit includes：
Generate the frequency conversion control unit of trigger signal, the first power end of the frequency conversion control unit, second source end point
Two ends not with single-phase fixed frequency alternating current are connected, the U ends of three output ends of frequency conversion control unit correspondence and motor,
V ends, the connection of W ends；
Two-way gating is controlled according to the trigger signal, so that single phase industrial frequence AC power is changed into three phase variable frequency
Alternating current, and form the electric machine rotary magnetic field of speed variable, the startup of controlled motor and the two-way switch unit of speed governing operation, institute
State the first input end of two-way switch unit to be connected with the first power end of the frequency conversion control unit, the two-way switch unit
Multiple trigger control ends it is corresponding with multiple trigger output ends of the frequency conversion control unit connection, the two-way switch unit
First output end, the second output end, the 3rd output end correspondence are connected with the U ends, V ends, W ends of motor；
Current of electric is detected, and by the protection location of pwm chopper controlled motor electric current, the protection location
First end is connected with the second input of the two-way switch unit, the second end of the protection location and the VFC list
The second source end connection of member, the detection output of the protection location is connected with the feedback end of the frequency conversion control unit, institute
The pulse-width controlled end of protection location is stated to be connected with the pulsewidth triggering end of the frequency conversion control unit.
Further, the two-way switch unit is three phase full bridge structure, including six half control type bidirectional electronic switch, point
It is not：First two-way switch, the second two-way switch, the 3rd two-way switch, the 4th two-way switch, the 5th two-way switch and the 6th pair
To switch；
First two-way switch, the 3rd two-way switch, the first anode of the 5th two-way switch are simultaneously institute
State the first input end of two-way switch unit, first two-way switch, the 3rd two-way switch, the 5th two-way switch
Second plate be respectively the two-way switch unit the first output end, the second output end, the 3rd output end, described first pair
It is respectively first, the of the two-way switch unit to the gate pole of switch, the 3rd two-way switch, the 5th two-way switch
3rd, the 5th trigger control end；
4th two-way switch, the 6th two-way switch, the second plate of second two-way switch are simultaneously institute
State the second input of two-way switch unit, the 4th two-way switch, the 6th two-way switch, second two-way switch
The first anode be respectively the two-way switch unit the first output end, the second output end, the 3rd output end, described 4th pair
It is respectively the 4th, the of the two-way switch unit to the gate pole of switch, the 6th two-way switch, second two-way switch
6th, the second trigger control end.
Further, the frequency conversion control unit includes：
Generate one or more position sensors of the position signalling of multiple rotor magnetic poles；
According to the position signalling of the rotor magnetic pole and single phase poaer supply synchronization pulse generation two-way switch switching state
The decoder of code；
The logic control of each half control type bidirectional electronic switch break-make is controlled according to two-way switch switching state code generation
The Logic control module of signal；
The interlocking isolation drive module of trigger signal is generated according to the logic control signal；
Generate the pulse width modulation module of pulse-width signal；
The output end of the position sensor and lock-out pulse is connected with the input of the decoder, the decoder
Output end is connected with the input of the Logic control module, and the output end of the Logic control module isolates drive with the interlocking
The input connection of dynamic model block, the output end of interlocking isolation drive module is the trigger control end of the frequency conversion control unit, institute
The output end for stating pulse width modulation module is connected with an input of the interlocking isolation drive module.
Further, the frequency conversion control unit includes：
Generate the frequency variation signal generator of three phase variable frequency square-wave signal；
According to the frequency variation signal and the decoder of single phase poaer supply synchronization pulse generation two-way switch switching state code；
The logic control of each half control type bidirectional electronic switch break-make is controlled according to two-way switch switching state code generation
The Logic control module of signal；
The interlocking isolation drive module of trigger signal is generated according to the logic control signal；
Generate the pulse width modulation module of pulse-width signal；
The three-phase square wave signal output part and lock-out pulse output end of the frequency variation signal generator and the decoder
Input is connected, and the output end of the decoder is connected with the input of the Logic control module, the Logic control module
Output end be connected with the input of the interlocking isolation drive module, interlock the output end of isolation drive module for the frequency conversion
The trigger control end of control unit, an input of the output end of the pulse width modulation module and the interlocking isolation drive module
Connection.
Further, the Logic control module includes multiple OR gates, and the input of plurality of OR gate is patrolled to be described
Multiple inputs of control module are collected, the output end of multiple OR gates is multiple output ends of the Logic control module.
Further, the single phase poaer supply synchronization pulse to single-phase fixed frequency AC power by being depressured
Rectification, shaping generation.
Further, the pulse-width signal is compared by detection electric current, the detection voltage of motor with predetermined current
Generation.
Further, the circuit also includes a switch K0, and the first power end of the frequency conversion control unit passes through institute
Switch K0 is stated to be connected with single-phase fixed frequency AC power.
Further, the protection location includes：
Current detection module, two-way full control switch K7；
A conduction terminal of the two-way full control switch K7 is the first end of the protection location, the two-way full control switch K7
Another conduction terminal be connected with the input of the current detection module, the detection output of the current detection module is described
The detection output of protection module, the earth terminal of the current detection module is the second end of the protection location, described two-way
Full control switch K7 control end is the pulse-width controlled end of the protection module.
The utility model embodiment touching signals control each bidirectional triode thyristor to be carried out under single-phase fixed frequency AC power
Two-way admittance, and single-phase fixed frequency AC power is changed into by three phase variable frequency in selective turn on process by bidirectional triode thyristor
The electric machine rotary magnetic field of alternating current and variable velocity, so that startup and the speed governing operation of motor are realized, and the utility model knot
Structure is simple and reliable, and cost is low, has expanded the use scope of three-phase permanent magnet synchronous motor.
Brief description of the drawings
Electric motor starting and the structure chart of speed-regulating control circuit that Fig. 1 provides for the utility model embodiment；
Frequency conversion in the electric motor starting and speed-regulating control circuit of the position sensor that Fig. 2 provides for the utility model embodiment
The structure chart of control unit；
Frequency conversion in the electric motor starting and speed-regulating control circuit of the position-sensor-free that Fig. 3 provides for the utility model embodiment
The structure chart of control unit.
The electric motor starting and the step of two switch conduction six of speed-regulating control circuit that Fig. 4 a provide for the utility model embodiment are just
Reversal switch transfer sequence schematic diagram；
The electric motor starting and the step of three switch conduction six of speed-regulating control circuit that Fig. 4 b provide for the utility model embodiment are just
Reversal switch transfer sequence schematic diagram；
The electric motor starting and the two of speed-regulating control circuit that Fig. 4 c provide for the utility model embodiment are switched, three switch alternatings
Turn on 12 step forward-reverse switch transfer sequence schematic diagrames.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain
The utility model, is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not constitute conflict and can be just mutually combined each other.
The utility model embodiment touching signals control each bidirectional triode thyristor to be carried out under single-phase fixed frequency AC power
Two-way admittance, and single-phase fixed frequency AC power is changed into by three phase variable frequency in selective turn on process by bidirectional triode thyristor
The electric machine rotary magnetic field of alternating current and variable velocity, so that startup and the speed governing operation of motor are realized, and the utility model knot
Structure is simple and reliable, and cost is low, has expanded the use scope of magneto.
Fig. 1 shows the electric motor starting of the utility model embodiment offer and the structure of speed-regulating control circuit, for the ease of
Illustrate, illustrate only the part related to the utility model.
As the embodiment of the utility model one, the self-starting control circuit for motor can drive permagnetic synchronous motor, also may be used
To drive asynchronous machine, it is widely used in the devices such as blower fan, water pump, electrical machine energy-saving, frequency control, high-speed electric expreess locomotive.
The electric motor starting and speed-regulating control circuit are connected between single-phase fixed frequency AC power and three phase electric machine, bag
Include：
Frequency conversion control unit 100, for generating trigger signal, the first power end of frequency conversion control unit, second source end
The two ends with single-phase fixed frequency AC power are connected respectively, the U ends of three output ends of frequency conversion control unit correspondence and motor,
V ends, the connection of W ends；
Two-way switch unit 200, for controlling the internal two-way gating respectively switched according to trigger signal, so that by single-phase work
Frequency AC power is changed into the electric machine rotary magnetic field of three phase variable frequency alternating current and speed variable, and controlled motor starts and speed governing operation,
The first input end of two-way switch unit and the first power end of frequency conversion control unit are connected, multiple triggerings of two-way switch unit
Control end connection corresponding with multiple trigger output ends of frequency conversion control unit, it is the first output end of two-way switch unit, second defeated
Go out end, the 3rd output end correspondence to be connected with the U ends, V ends, W ends of motor；
Protection location 300, for detecting current of electric, and passes through pwm chopper controlled motor electric current, protection location
First end be connected with the second input of two-way switch unit, the second electricity of the second end of protection location and frequency conversion control unit
Source is connected, and the detection output Vi of protection location and the feedback end of frequency conversion control unit are connected, the pulse-width controlled of protection location
End is connected with the pulsewidth triggering end G7 of frequency conversion control unit.
Preferably, circuit also includes a switch K0, the first power end of frequency conversion control unit 100 by switch K0 with it is single-phase
Fixed frequency AC power is connected.
Specifically, two-way switch unit 200 is three phase full bridge structure, including six half control type bidirectional electronic switch, respectively
For：First two-way switch K1, the second two-way switch K2, the 3rd two-way switch K3, the 4th two-way switch K4, the 5th two-way switch K5
With the 6th two-way switch K6；
First two-way switch K1, the 3rd two-way switch K3, the 5th two-way switch K5 first anode are simultaneously two-way switch
The first input end of unit 200, the first two-way switch K1, the 3rd two-way switch K3, the 5th two-way switch K5 second plate point
Not Wei two-way switch unit 200 the first output end U, the second output end V, the 3rd output end W, the first two-way switch K1, the 3rd
Two-way switch K3, the 5th two-way switch K5 gate pole are respectively the first of two-way switch unit 200, the three, the 5th triggering controls
End；
4th two-way switch K4, the 6th two-way switch K6, the second two-way switch K2 second plate are simultaneously two-way switch
Second input of unit 200, the 4th two-way switch K4, the 6th two-way switch K6, the second two-way switch K2 first anode point
Not Wei two-way switch unit 200 the first output end U, the second output end V, the 3rd output end W, the 4th two-way switch K4, the 6th
Two-way switch K6, the second two-way switch K2 gate pole are respectively the four, the six, the second triggering controls of two-way switch unit 200
End.
Preferably, the half control type bidirectional electronic switch can realize that bidirectional thyristor has cost using bidirectional thyristor
The advantages of low, capacity is big, overload power is strong, loss is small.
Specifically, protection location 300 includes：
Current detection module, two-way full control switch K7；
A two-way full control switch K7 conduction terminal is the first end of protection location 300, and two-way full control switch the another of K7 leads
The input connection of go side and current detection module, the detection output Vi of current detection module is the detection of protection location 300
Output end, the earth terminal of current detection module is the second end of protection location 300, and two-way full control switch K7 control end is protection
The pulse-width controlled end of unit 300.
The utility model embodiment touching signals control each bidirectional triode thyristor to be carried out under single-phase fixed frequency AC power
Two-way admittance, and single-phase fixed frequency AC power is changed into by three phase variable frequency in selective turn on process by bidirectional triode thyristor
The electric machine rotary magnetic field of alternating current and variable velocity, so that startup and the speed governing operation of motor are realized, and the utility model knot
Structure is simple and reliable, and cost is low, has expanded the use scope of magneto.
Fig. 2 is shown in the electric motor starting and speed-regulating control circuit of the position sensor that the utility model embodiment is provided
The structure of frequency conversion control unit, for convenience of description, illustrate only the part related to the utility model.
As the embodiment of the utility model one, frequency conversion control unit 100 can include：
One or more position sensors, the position signalling for generating multiple rotor magnetic poles；
Decoder 101, for the position signalling according to rotor magnetic pole and single phase poaer supply synchronization pulse generation two-way opened
Concern changes conditional code；
Logic control module 102, for controlling each half control type bidirectional electronic to open according to the code generation of two-way switch switching state
Close the logic control signal of break-make；
Isolation drive module 103 is interlocked, for generating trigger signal according to logic control signal；
Pulse width modulation module 104, for generating pulse-width signal；
The input of the output end of position sensor and decoder is connected, the output end of decoder and Logic control module
Input is connected, and the output end of Logic control module is connected with interlocking the input of isolation drive module, interlocks isolation drive mould
Block output end is the trigger control end of frequency conversion control unit, the output end of pulse width modulation module and the one of interlocking isolation drive module
Input is connected.
Certainly, frequency conversion control unit 100 also includes some necessary operational modules, for example step-down rectifier, shaping circuit, same
The functional circuits such as pace pulse, filtering voltage regulation, can be single-phase to single-phase fixed frequency AC power progress step-down rectifier, shaping generation
Line lock pulse signal, its annexation and operation principle are prior art, and here is omitted.
Preferably, Logic control module 102 include multiple OR gates, for example OR gate 1, OR gate 2, OR gate 3, OR gate 4, OR gate 5,
OR gate 6, the input of plurality of OR gate is multiple inputs of Logic control module 102, and the output end of multiple OR gates is to patrol
Collect multiple output ends of control module 102.
Preferably, interlocking isolation drive module 103 includes multiple interlocking isolated drive circuits, and plurality of interlocking isolation is driven
The input of dynamic circuit is multiple inputs of interlocking isolation drive module 103, the output end of multiple interlocking isolated drive circuits
To interlock multiple output ends of isolation drive module 103.
Preferably, pulse-width signal is compared generation by the detection electric current of motor, detection voltage with given current signal,
The detection electric current, detection voltage and given current signal can by the current detecting inside or outside frequency conversion control unit 100,
Voltage detecting, given function of current module are provided, the wherein input of the current sense function module inside frequency conversion control unit 100
End can receive the detection electric current of feedback as the feedback end of frequency conversion control unit.
Illustrated in the utility model embodiment with three position sensors H1, H2, H3.
First power end of frequency conversion control unit 100, second source end connect power supply 1,2 ends respectively, its multiple triggering control
End processed includes：G1, G3, G5, G4, G6, G2, G7, connect two-way full control switch K1~K7 corresponding Same Name of Ends, control K1~K7 respectively
Open and turn off, the preferably bidirectional controllable silicons of K1~K6, the preferably bidirectional turn-off devices of K7 (such as just antiparallel IGBT, MOS or
Triode).The output end of frequency conversion control unit 100 includes：U, V, W, and GA, GB, G, output end U, V, W correspondence connection motor
U ends, V ends, W ends, wherein, output end GA connections it is two-way it is full control switch K1, K3, K5 first anode common port, output end GB connect
Two-way full control switch K4, K6, K2 second plate common port are connect, is also the common port of K4, K6, K2 trigger circuit, output end G connects
Connect the second source end of frequency conversion control unit 100, the second end of protection location 300 and publicly.
Power supply 1, the single phase alternating current power supply of 2 ends input, provide complete through step-down rectifying circuit, diode, filter regulator circuit
DC supply needed for portion's circuit；The rectangle lock-out pulse D of the shaped circuit output single phase poaer supply of step-down rectifying circuit, two poles
Pipe prevents DC voltage from influenceing rectangle synchronous working pulse.Position sensor H1, H2, H3 (preferably with Hall sensor), generation
Six step position signallings, with reference to lock-out pulse D, 12 two-way switch switching state codes of generation are isolated through decoder, OR gate, interlocking
Drive circuit drives corresponding bidirectional electronic switch ON/OFF；Such as decoder is when it is 0101 to run into conditional code, and 0101 mouthful defeated
Go out for 1, other state outputs are 0, now switching number is 12, therefore need to connect OR gate 1 and OR gate 2, triggering K1, K2 bidirectional electronic is opened
Conducting is closed, wherein OR gate 1 is also connected with 1101,0010,1010 output ends of decoder, be concurrently in charge of 1101/61 state, 0010/61 shape
K1 switches are opened when state, 1010/12 state, and OR gate 2 is then also connected with 0111,1010,1000 output ends, be concurrently in charge of 0111/23,
1010/12nd, K2 switches are opened during 1000/23 state；Other are similarly repeated no more, and are consequently formed two switches and are simultaneously turned on six steps and follow
Ring switching mode, the i.e. alternate conduction -34/61 of 12/45 alternate conduction -23/56 alternate conduction -45/12 alternate conduction -56/
The alternate conduction of 23 alternate conductions-61/34-.Here 12/45 alternate conduction representation switch K1, K2 is switched on after simultaneously turning on
Close K4, K5 to simultaneously turn on, 23/56 alternate conduction etc. does identical understanding.
Speed regulation can control the size of given current value, be compared with current detection signal, via pulse width modulation control
K7 switch-mode regulations motor working current processed, therefore torque and the speed of motor can be adjusted；When actual current is less than given electric current
When export high level, low level is exported when actual current is more than given electric current, then through the positive switch of drive circuit driving output
Drive signal needed for device and reverser device, what driving K7 was switched opens shut-off；Adjust smoothing factor and electric current is poor
Value, then can control the frequency of pulsewidth modulation, 3~30 times of electric moter voltage fundamental frequency when this pulse width modulation frequency is maximum speed.
Voltage, current protecting circuit can be according to overvoltage/under-voltage/overcurrent condition control drive circuit shut-off K7.
Interlocking isolated drive circuit feature is interlocking：The actual triggering safety interlock time more late than control signal, and its
Shut-off is synchronous with control signal, so as to ensure that same bridge arm up/down switch will not be simultaneously turned on, isolates：To the not triggering on ground altogether
Signal is isolated (such as Phototube Coupling, transformer isolation, independent current source), driving：Power amplification is carried out to control signal, with
Ensure driving power needed for main switch.
, only need to be double to switch K8 controls by double-pole when circuit controlled motor is inverted, H2, H3 signal exchange be connected to decoder b,
C ends.
The present embodiment uses positive logic circuit realiration, similarly can also use negative logic circuit, and MCU adds software, FPGA and
ASIC circuit is realized.
As the another embodiment of the utility model, referring to Fig. 3, the frequency conversion control unit of sensorless strategy can also be wrapped
Include：
Frequency variation signal generator 105, for generating three phase variable frequency square-wave signal；
Decoder 101, for generating two-way switch switching state according to frequency variation signal and single phase poaer supply synchronization pulse
Code；
Logic control module 102, for according to two-way switch switching state code generation logic control signal；
Isolation drive module 103 is interlocked, for generating trigger signal according to logic control signal；
Pulse width modulation module 104, for generating pulse-width signal；
The three-phase square wave signal output part of frequency variation signal generator and the input of lock-out pulse output end and decoder connect
Connect, the output end of decoder and the input of Logic control module are connected, the output end of Logic control module isolates drive with interlocking
The input connection of dynamic model block, the output end of interlocking isolation drive module is the trigger control end of frequency conversion control unit, and pulsewidth is adjusted
The output end of molding block is connected with interlocking an input of isolation drive module.
Table 1
In the utility model embodiment, table 1 understands to rotate forward code and switching tube switching table with reference to Fig. 2, Fig. 4 a, when
When rotor is rotated forward, (such as three Hall sensors are placed in A, B, C phase winding groove to the position sensor that several distributions are placed
On mouth) rotor magnetic pole position signal (N=1, S=0), and then combination producing position code, A phase position sensors can be perceived respectively
H1, B-phase put sensor H2, C phase position sensor H3 position signallings and are combined into six kinds of different position codes, to represent difference
Rotor electrical angle position；
Take AC power lock-out pulse (AC power be more than 0 when=1, AC power be less than 0 when=0), with a certain electricity
Angular interval opens K1K2 (power supply is more than 0) and K4K5 (power supply is less than 0) when opening different switches sets, such as 0-60 electrical angles,
To obtain required winding and the sense of current, position code is combined with line lock pulse code, 12 different shapes are just generated
State code；
By rotating forward order switching switches set in table 1, it just can obtain required three phase electric machine and rotate forward switch switching figure.Actual fortune
In row, position sensor signal frequency (being proportional to motor speed) is change, and in certain position, interval AC power is same during low frequency
Pace pulse can be converted repeatedly, and repeatedly switch related switch group, and during high frequency in the interval AC power lock-out pulse in certain position not
It can convert, thus only trigger one group of switches set；
12 kinds of switching states are simplified statement in table, for convenience of explanation later, and 6 kinds are also further reduced in table
Switch code name, such as 12 represent the work shape that the continuous alternate conduction of conditional code is pressed in 0-60 electrical angles interval K1, K2 and K4, K5
State, its rotate forward switching order be, 12-23-34-45-56-61-, constantly rotate forward circulation, wherein "-" represent switch；
Obviously, position sensor placement location is different, and positive and negative orientation is different, and its angle position formed code is also different
, but it is identical according to different rotor position interval, the rule for turning to, opening respective switch group, same principle exists
This patent protection domain；
When rotor often goes to 360 electrical angle, its waveform correlation, code and switch open relation equivalent to again from 0 electric angle
Degree repeats to rotate forward circulation.
Table 2
In the utility model embodiment, table 2 is reversion code and switching tube switching table, with reference to Fig. 2, Fig. 4 a, in difference
Position interval and lock-out pulse state, can similarly obtain 12 kinds of inverted status codes；
Correspondence backward position state of section code, its switching order is, 61-56-45-34-23-12-, constantly instead
Turn circulation, just can obtain required three phase electric machine reversion terminal voltage waveform, wherein "-" represents switching；
It is interval in diverse location, during line lock pulse change, passed with the continuous switched conductive of bridge arm switches set, and position
Sensor signal frequency is in low frequency and high frequency, and its switch law as hereinbefore, will not be repeated here；
Obviously, position sensor placement location difference, direction are different, and its angle position formed code is also different, but
It is that it is identical according to the rule of different rotor position release of section respective switch group, therefore its principle protects model in this patent
Enclose；
When rotor often goes to -360 electrical angle, its waveform correlation, code and switching tube open relation equivalent to again from 0
Electrical angle repeats reverse cycle.
It is appreciated that when sensor and synchronization pulse sequence are different, its conditional code is also different, and two-way switch numbering is suitable
Sequence is different, and switch number of switching is also different needed for it, but it determines that triggering is corresponding according to motor rotor position code and rotation direction
Switch alternate conduction and the logical derivation algorithm of order switching are constant, and also 3 switches can be exported while leading with this derivation algorithm
Logical six step cyclic switching modes, 2 switches simultaneously turn on the 12 step cyclic switching mode controls that interspersed progress is simultaneously turned on 3 switches
Logic processed, same principle belongs to this patent protection domain.
Similarly, referring to Fig. 4 b, three switches can be exported and simultaneously turned on, 6 steps are positive/negative to turn code and switching tube switching table, herein
Repeat no more.
Similarly, referring to Fig. 4 c, the switch of two switches/tri- can be exported and alternately simultaneously turned on, 12 steps are positive/negative to turn code and switching tube
Switching table, will not be repeated here.
Frequency conversion control circuit without sensor shown in Fig. 3, only instead of 3 phase positions sensing with 3 phase inverter signal generators
Device produce 3 phase inverter signals, other circuit theories with it is preceding identical, will not be repeated here.
The another object of the utility model embodiment is there is provided a kind of drive control method based on foregoing circuit, when
Trigger signal controls the half control type bidirectional electronic switch two to simultaneously turn on, and the circular order of trigger signal is six steps：
When power supply is in positive half-wave, 2 switches are simultaneously turned on and to circulate conduction mode as follows：
K1, K2 are turned on, and current of electric flows to W by U；
K2, K3 are turned on, and current of electric flows to W by V；
K3, K4 are turned on, and current of electric flows to U by V；
K4, G5 are turned on, and current of electric flows to U by W；
K5, K6 are turned on, and current of electric flows to V by W；
K6, K1 are turned on, and current of electric flows to V by U.
When power supply is in negative half-wave, 2 switches are simultaneously turned on and to circulate conduction mode as follows：
K4, K5 are turned on, and current of electric still flows to W by U；
K5, K6 are turned on, and current of electric flows to W by V；
K6, K1 are turned on, and current of electric flows to U by V；
K1, K2 are turned on, and current of electric flows to U by W；
K2, K3 are turned on, and current of electric flows to V by W；
K3, K4 are turned on, and current of electric flows to V by U.
By the sense of current is identical, (such as K1, K2 and K4, K5 are handed over power supply positive half-wave with negative half-wave conduction mode alternate conduction
For conducting, K2, K3 and K5, K6 alternate conduction), though then supply voltage be just or be it is negative, circuit can obtain needed for around
The switch switching mode of group and specified current flow conducting direction, is easy meter, two-way switch alternate conduction and is followed when its power supply is positive/negative
Ring switch mode is reduced to：12—23—34—45—56—61—.
When trigger signal controls the half control type bidirectional electronic switch three to simultaneously turn on, the circular order of trigger signal
For six steps：
When power supply is in positive half-wave, 3 switches are simultaneously turned on and to circulate conduction mode as follows：
K1, K2, K3 are turned on, and current of electric flows to W by U, V；
K2, K3, K4 are turned on, and current of electric flows to U, W by V；
K3, K4, K5 are turned on, and current of electric flows to U by V, W；
K4, G5, K6 are turned on, and current of electric flows to U, V by W；
K5, K6, K1 are turned on, and current of electric flows to V by W, U；
K6, K1, K2 are turned on, and current of electric flows to V, W by U.
When power supply is in negative half-wave, 3 switches are simultaneously turned on and to circulate conduction mode as follows：
K4, K5, K6 are turned on, and current of electric still flows to W by U, V；
K5, K6, K1 are turned on, and current of electric flows to U, W by V；
K6, K1, K2 are turned on, and current of electric flows to U by V, W；
K1, K2, K3 are turned on, and current of electric flows to U, V by W；
K2, K3, K4 are turned on, and current of electric flows to V by U, W；
K3, K4, K5 are turned on, and current of electric flows to V, W by U.
By the sense of current is identical, power supply positive half-wave and negative half-wave conduction mode alternate conduction (such as K1, K2, K3 and K4,
K5, K6 alternate conduction, K2, K3, K4 and K5, K6, K1 alternate conduction), no matter then supply voltage is just or is negative, circuit is equal
The switch switching mode of winding and specified current flow conducting direction, is easy meter, two-way switch when its power supply is positive/negative needed for can obtaining
Alternate conduction and cyclic switching pattern are reduced to：123—234—345—456—561—612—.
Using above-mentioned cyclic switching conduction mode, then can be formed six step three-phase windings electric currents rotate forward circulation conducting and
The motor-field rotated forward, and then motor rotates forward.
With reference to Fig. 4 c, the mode that combination is simultaneously turned on 3 switches is simultaneously turned on according to 2 switches, it is double when its power supply is positive/negative
It can be reduced to switch alternate conduction and cyclic switching pattern：12—123—23—234—34—345—45—456—56—
561-61-612-, 12 step cyclic switching conduction modes can then form 12 rotating forward for step three-phase windings electric current and follow
Ring is turned on and the motor-field that rotates forward, and then motor is rotated forward.
Certainly, switch if above-mentioned switch is switched into code name recycled back, such as (61-56-45-34-23-12 -),
Or (612-561-456-345-234-123 -) or (612-61-561-56-456-45-345-34-
234-23-123-12 -) the reverse rotation circulation conducting of 3 phase winding electric currents, then can be formed, and then forms what is reversely rotated
Armature field, motor is reversely rotated.
Frequency conversion control circuit sends G1, G2, G3, G4, G5, G6, G7 trigger signal, and K1-K7 bidirectional electronics are triggered respectively and are opened
Close conducting, close, you can be synchronised motor, 3 phase BLDC motors, 3 phase Induction Machines of driving 3 are positive or reversely rotate.
In Fig. 1, K1~K6 need to use isolated drive circuit (such as photoelectricity, transformer or insulating power supply), and K7 is used and driven altogether
Dynamic circuit.
Circuit is provided with voltage protection circuit and current detection circuit, to over-pressed, under-voltage, excessively stream, and control circuit can stop touching
Hair, shutdown protection；Current detection signal is compared with given current signal, and (current detection signal is less than given current signal and then opened
K7, current detection signal is more than given current signal and then closes K7) PWM pulse-width signals are produced, to adjust actual motor current
Approximately give electric current.
The utility model embodiment touching signals control each bidirectional triode thyristor to be carried out under single-phase fixed frequency AC power
Two-way admittance, and single-phase fixed frequency AC power is changed into by three phase variable frequency in selective turn on process by bidirectional triode thyristor
The electric machine rotary magnetic field of alternating current and variable velocity, so that startup and the speed governing operation of motor are realized, and the utility model knot
Structure is simple and reliable, and cost is low, has expanded the use scope of three-phase motor with permanent magnets.
It is appreciated that this circuit is also applied for the speed governing of threephase asynchronous.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
Any modifications, equivalent substitutions and improvements made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (9)
1. a kind of electric motor starting and speed-regulating control circuit, are connected between single-phase fixed frequency AC power and three phase electric machine, its
It is characterised by, the circuit includes：
Generate the frequency conversion control unit of trigger signal, the first power end of the frequency conversion control unit, second source end respectively with
The two ends connection of single-phase fixed frequency alternating current, three output ends correspondence of the frequency conversion control unit and the U ends of motor, V ends,
W ends are connected；
Two-way gating is controlled according to the trigger signal, so that single phase industrial frequence AC power is changed into three phase variable frequency exchange
Electricity, and the electric machine rotary magnetic field of speed variable, the startup of controlled motor and the two-way switch unit of speed governing operation are formed, it is described double
First power end of first input end and the frequency conversion control unit to switch element is connected, the two-way switch unit it is many
The connection corresponding with multiple trigger output ends of the frequency conversion control unit of individual trigger control end, the first of the two-way switch unit
Output end, the second output end, the 3rd output end correspondence are connected with the U ends, V ends, W ends of motor；
Current of electric is detected, and passes through the protection location of pwm chopper controlled motor electric current, the first of the protection location
End is connected with the second input of the two-way switch unit, the second end and the frequency conversion control unit of the protection location
Second source end is connected, and the detection output of the protection location is connected with the feedback end of the frequency conversion control unit, described to protect
The pulse-width controlled end of shield unit is connected with the pulsewidth triggering end of the frequency conversion control unit.
2. circuit as claimed in claim 1, it is characterised in that the two-way switch unit is three phase full bridge structure, including six
Individual half control type bidirectional electronic switch, be respectively：First two-way switch, the second two-way switch, the 3rd two-way switch, the 4th two-way opened
Pass, the 5th two-way switch and the 6th two-way switch；
First two-way switch, the 3rd two-way switch, the first anode of the 5th two-way switch are simultaneously to be described double
To the first input end of switch element, first two-way switch, the 3rd two-way switch, the of the 5th two-way switch
Two anodes are respectively the first output end, the second output end, the 3rd output end of the two-way switch unit, first two-way opened
Pass, the 3rd two-way switch, the gate pole of the 5th two-way switch be respectively the two-way switch unit first, the 3rd,
5th trigger control end；
4th two-way switch, the 6th two-way switch, the second plate of second two-way switch are simultaneously to be described double
To the second input of switch element, the 4th two-way switch, the 6th two-way switch, the of second two-way switch
One anode is respectively the first output end, the second output end, the 3rd output end of the two-way switch unit, the 4th two-way opened
Pass, the 6th two-way switch, the gate pole of second two-way switch be respectively the two-way switch unit the four, the 6th,
Second trigger control end.
3. circuit as claimed in claim 2, it is characterised in that the frequency conversion control unit includes：
Generate one or more position sensors of the position signalling of multiple rotor magnetic poles；
Two-way switch switching state code is generated according to the position signalling of the rotor magnetic pole and single phase poaer supply synchronization pulse
Decoder；
The logic control signal of each half control type bidirectional electronic switch break-make is controlled according to two-way switch switching state code generation
Logic control module；
The interlocking isolation drive module of trigger signal is generated according to the logic control signal；
Generate the pulse width modulation module of pulse-width signal；
The output end of the position sensor and lock-out pulse is connected with the input of the decoder, the output of the decoder
End is connected with the input of the Logic control module, the output end of the Logic control module and the interlocking isolation drive mould
The input connection of block, the output end of interlocking isolation drive module is the trigger control end of the frequency conversion control unit, the arteries and veins
The output end of wide modulation module is connected with an input of the interlocking isolation drive module.
4. circuit as claimed in claim 2, it is characterised in that the frequency conversion control unit includes：
Generate the frequency variation signal generator of three phase variable frequency square-wave signal；
According to the frequency variation signal and the decoder of single phase poaer supply synchronization pulse generation two-way switch switching state code；
The logic control signal of each half control type bidirectional electronic switch break-make is controlled according to two-way switch switching state code generation
Logic control module；
The interlocking isolation drive module of trigger signal is generated according to the logic control signal；
Generate the pulse width modulation module of pulse-width signal；
The three-phase square wave signal output part and lock-out pulse output end of the frequency variation signal generator and the input of the decoder
End connection, the output end of the decoder is connected with the input of the Logic control module, the Logic control module it is defeated
The input for going out end with the interlocking isolation drive module is connected, and the output end of interlocking isolation drive module is the VFC
The trigger control end of unit a, input of the output end of the pulse width modulation module and the interlocking isolation drive module connects
Connect.
5. the circuit as described in claim 3 or 4, it is characterised in that the Logic control module includes multiple OR gates, wherein many
The input of individual OR gate is multiple inputs of the Logic control module, and the output end of multiple OR gates is the logic control mould
Multiple output ends of block.
6. the circuit as described in claim 3 or 4, it is characterised in that the single phase poaer supply synchronization pulse passes through to single-phase
Fixed frequency AC power carries out step-down rectifier, shaping generation.
7. the circuit as described in claim 3 or 4, it is characterised in that the pulse-width signal by the detection electric current of motor,
Detection voltage is compared generation with predetermined current.
8. circuit as claimed in claim 2, it is characterised in that the circuit also includes a switch K0, the VFC list
First power end of member is connected by the switch K0 with single-phase fixed frequency AC power.
9. circuit as claimed in claim 2, it is characterised in that the protection location includes：
Current detection module, two-way full control switch K7；
A conduction terminal of the two-way full control switch K7 is the first end of the protection location, and the two-way full control switch K7's is another
One conduction terminal is connected with the input of the current detection module, and the detection output of the current detection module is the protection
The detection output of unit, the earth terminal of the current detection module is the second end of the protection location, the two-way full control
The control end for switching K7 is the pulse-width controlled end of the protection location.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621319017.4U CN206461541U (en) | 2016-12-02 | 2016-12-02 | A kind of electric motor starting and speed-regulating control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621319017.4U CN206461541U (en) | 2016-12-02 | 2016-12-02 | A kind of electric motor starting and speed-regulating control circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788000A (en) * | 2016-12-02 | 2017-05-31 | 深圳天才动力科技有限公司 | A kind of electric motor starting and speed-regulating control circuit and its drive control method |
| CN109802572A (en) * | 2019-01-28 | 2019-05-24 | 深圳市航天新源科技有限公司 | A kind of power router and its control method |
| TWI793311B (en) * | 2018-04-23 | 2023-02-21 | 美商波音公司 | Externally modulated independent speed variable frequency generator |
| CN116345961A (en) * | 2023-03-13 | 2023-06-27 | 龙芯中科(金华)技术有限公司 | Motor control system, motor control method, electronic equipment and readable storage medium |
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2016
- 2016-12-02 CN CN201621319017.4U patent/CN206461541U/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106788000A (en) * | 2016-12-02 | 2017-05-31 | 深圳天才动力科技有限公司 | A kind of electric motor starting and speed-regulating control circuit and its drive control method |
| CN106788000B (en) * | 2016-12-02 | 2022-12-23 | 深圳市斗索科技有限公司 | Motor starting and speed regulating control circuit and driving control method thereof |
| TWI793311B (en) * | 2018-04-23 | 2023-02-21 | 美商波音公司 | Externally modulated independent speed variable frequency generator |
| CN109802572A (en) * | 2019-01-28 | 2019-05-24 | 深圳市航天新源科技有限公司 | A kind of power router and its control method |
| CN109802572B (en) * | 2019-01-28 | 2021-01-12 | 深圳市航天新源科技有限公司 | Power router and control method thereof |
| CN116345961A (en) * | 2023-03-13 | 2023-06-27 | 龙芯中科(金华)技术有限公司 | Motor control system, motor control method, electronic equipment and readable storage medium |
| CN116345961B (en) * | 2023-03-13 | 2024-04-19 | 龙芯中科(金华)技术有限公司 | Motor control system, motor control method, electronic equipment and readable storage medium |
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Effective date of registration: 20210910 Address after: 518000 1501, building 5, South Taiyun chuanggu Park, Southeast of the intersection of Guangming Avenue and Dongchang Road, Tangwei community, Fenghuang street, Guangming District, Shenzhen, Guangdong Province Patentee after: Shenzhen dousuo Technology Co.,Ltd. Address before: Room 201, Building A, No. 1, Qianwan Road, Qianhai-Shenzhen-Hong Kong Cooperation Zone, Shenzhen, Guangdong Province, 518000 Patentee before: Shenzhen Geniusmart Technologies Co.,Ltd. |